That is not how the power saving works. It does not vary the BCLK rather it alters the multiplier. If it varied the BCLK by such large amounts to achieve typica

That is not how the power saving works. It does not vary the BCLK rather it alters the multiplier. If it varied the BCLK by such large amounts to achieve typical low power frequency levels then you'd likely run into some catastrophic stability problems as the BCLK is also used by the integrated memory controller and QPI.